Extra bases

• One day after nearly no-hitting the Red Sox, Jake Arrieta was doing his cardio workout at Fenway Park in preparation for his next start Sunday against the Nationals. The Cubs have an off-day Thursday, so all of the starters will get an extra day of rest. Arrieta threw a career-high 120 pitches Monday.

"He should be OK," Renteria said.

Carrie Muskat is a reporter for MLB.com. She writes a blog, Muskat Ramblings, and you can follow her on Twitter @CarrieMuskat. This story was not subject to the approval of Major League Baseball or its clubs.